For those seeking a nice way to add audio to their projects, here's another solution from Rugged Circuits. ;-)

http://www.ruggedcircuits.com/html/flexible_midi_shield.html

and

http://www.ruggedcircuits.com/html/beatvox.html

One thing I loved about this MIDI shield is that you get to select what pins you want to use, and there's also the MIDI Enable pin, so uploading to the board doesn't require a switch-change like the SparkFun's MIDI Shield had.